Wouldn't that just mean that you scratch the film slowly, instead of rapidly, i wonder.

I think this (fast or slow winding) is one thing in which empiric testing is of great value. And you rarely hear about discharge marks on film due to fast (motordriven even) transport, let alone get a chance to see them produced by you and the way you wind.
Im not saying that they don't occur. But i would dare to suggest that it's not something to worry about constantly. So i never did wind film slowly, unless (yes, the fear got to me too) in sub-freezing conditions.